back to JDK 11 because VMlens does not does not fully support JDK 17

pom.xml

@@ -9,7 +9,7 @@
     <version>1.0-SNAPSHOT</version>
 
     <properties>
-        <javac.target>17</javac.target>
+        <javac.target>11</javac.target>
         <junit.version>5.8.2</junit.version>
         <uberjar.name>jcstress</uberjar.name>
         <vmlens.version>1.1.5</vmlens.version>

src/test/java/cz/cvut/fel/esw/nonblock/map/VmlensStringSetTest.java

@@ -15,8 +15,8 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
  */
 public class VmlensStringSetTest {
 
-    Supplier<StringSet> testedSet = () -> new NonblockStringSet(1);
-//    Supplier<StringSet> testedSet = () -> new SynchronizedStringSet(1);
+//    Supplier<StringSet> testedSet = () -> new NonblockStringSet(1);
+    Supplier<StringSet> testedSet = () -> new SynchronizedStringSet(1);
 
 
     /**

src/test/java/cz/cvut/fel/esw/nonblock/map/vmlens/VmlensTestRunner.java

@@ -108,7 +108,9 @@ public class VmlensTestRunner {
         initTasks.forEach(init -> init.accept(set));
 
 
-        List<Thread> threads = parallelTasks.stream().map(task -> new Thread(() -> task.accept(set))).toList();
+        List<Thread> threads = parallelTasks.stream()
+                                            .map(task -> new Thread(() -> task.accept(set)))
+                                            .collect(Collectors.toList());
         threads.forEach(Thread::start);
         for (Thread thread : threads) {
             thread.join();